Usn
abbr. 美国海军（United States Navy）
📖 牛津释义
USN
abbr
缩写 = United States Navy 美国海军.
🗣️ 情景例句
It would be a great business if you could do that.
假如你能办到那样的话， 可是一笔大生意。
How much is it by registered mail?
挂号信要多少钱？
That's neat.
这很好。